This app dims your phone so you’re not a complete dingus at concerts

When it comes to using our phones at concerts, we’ll admit it: We’ve been that guy. You know him: He’s the punter who, in the middle of a darkened venue, checks his phone at full brightness. He’s the dink who, along with dozens of others, holds up his phone to snap pics of the show—resulting in a sea of glowing screens rimming the stage. We’ve all done it before, so we’re reserving our judgment. But we’ll admit that cellphone photography at concerts is at best annoying, and at worst, completely disruptive.

That’s why we were glad to learn about Kimd, an iPhone app that encourages respectful concert photography. When it’s running, the app dims your screen, disables your phone’s flash—which the band will be thankful for—and allows you take take a photo by touching the screen anywhere, ensuring that you’re not futzing around to snap a photo. The app won’t only placate the people standing behind you; it also makes on-the-fly photography easier.

The best part? It’s free, so once you’ve downloaded it, you can passive-aggressively remind other concert-goers that they should, too. Here’s how it works.